Wrench.



W. H. MOZINGO.

WRENCH. 7 APPLICATION FILED MAR. 80, 1914.

Patented Dec. 15, 1914.

O O J i 0 w 1 z j Attorneys To all whom it may concern:

UNIT STATES PATENT OFFICE.

, WILL AM H.-,1VIOZINGO, or HURD'LAND, MISSOURI.

WRENCH.

Be it known that I, WILLIAM H. MoziNeo, a citizen of the United States, residing at Hurdland, in the county of Knox and State of Missouri, have invented a new and useful Wrench, of which the following is a specification. i

This invention relates to improvements in wrenches. j

a An object of the present invention is to provide a wrench having an extensible handle such that the length of the lever arm during the turning of a nut, will be dependent upon the size of the nut being turned.

A further objectis to provide a wrench which may be easily and quickly adjusted to engage nuts of different sizes and the greater the force applied to the wrench, the

more securely will the nut be grasped.

A further object is to provide a wrench with a locking lever holding the movable jaw rigidly in place and to'which locking,

lever is p votally secured a link, the latter actuatinga pipe engaging member so that the wrench may be employed for the turn ing of either round or polygonal objects.

' With the foregoing and other objects in view which will appear as the description proceeds,the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being. understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit oft-he invention. a

In the drawings accompanying this specification and forming a part thereof, the

preferred embodiment of my invention is illustrated, in which Figure'l is a view in elevation of my improved wrench with portions thereof broken away to more clearly illustrate the structural details thereof. Fig. 2 is a similar view of the wrench inwhich the pipe engaging features have been omitted. Fig. 3 is a diagrammatic view of the wrench disclosed in Fig. 1 and showing the same in an open position. Fig. 4 is asimilar view of the wrench shown in Fig. 2. Y

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views 5 is the head and 6 the shankof the movable Specification of Letters Patent. 7 Patented Dec. 15, 1914.

- Application filed March 30, 1514. Serial No. 828,376. j

jaw and which shank is provided with the angular teeth 13 which interlock with the serrated edge"? of the shank. Inasmuch as the pivot pin 13', by means of which the locking link is secured to the ears 9, is spaced a distance from the shank, and furthermore that the serrated edge 12 does not extend as far as, nor stop adjacent to, the said pivot pin, it provides that when the movable jaw is extended and a force is brought to bear thereon, tending to retract the same such as will be applied when it is desired to grip a nut between the stationary and movable jaws, the force of the shank 6 upon the link 10 will produce a turning moment about the pivot pin 13 forcing the locking lever out of contact with the shank and allowingfor the free retraction of the movable jaw. However, after the movable jaw has contacted with the nut and the wrench is turned, the force tending to spread the jaws apart, thatis, extending the movable jaw, will result in the locking link being drawn more tightly into engagement with the shank 6, thus more securely locking the movable'jaw against such movement.

Ahandle 14 is provided with a polygonal slot 15 extending therein and slidably receiving the shank 6. The said handle includes' a pair of ears or lugs 16 and between which is pivotally secured the locking lever 17. The locking lever is pivotally secured as at 18 to the rear end of the locking link 10, in'such manner that when the locking lever is moved against the handle 14, the

link will be drawn into contact with the shank of the movable jaw. Thus as the hand grips the handle and locking lever and moves the same together, the movable jaw will be locked in place. The locking lever is provided with the notched portion 19 which allows for the insertion of the finger of the operator for moving the locking lever forcibly away from the handle should it be so desired.

The wrench illustrated in Fig. 1 is similar to the foregoing, with the exception that the stationary jaw is provided at its rear portion with the outstanding ears 20, to which is pivotally secured the pipe engaging member 21. The latter is provided with the pipe engaging end 22, suitably serrated or sharpened so as to grip a round object and-which coacts with the rearwardly 6X4 tending pipe engaging jaw 23 of the member. The movable member 21 is pivotally secured-at its rear extremity to the actuating link 24-, the latter being also secured. as at to the locking link 10. The link 2% and also the member 21 are detachably secured in the position illustrated and may be removed or detached should it beso desired. As the locking link 10 is drawn down into engagement with the shank 6 to thus lock the shank against movement, the link Qwill move the rearextremity of the member 21 away from the shank, with. the result that the pipe engaging end 22 will move toward the jaw 23 so as to rigidly engage a cylindrical object which may be interposed therebetween. I V

The many advantages of the wrench herein described will be apparent, among which is mentioned the fact that as the movable awwithits shank is extended, the distance between the handle and the nut interposed between the jaws will be lengthened, thus lengthening the lever arm and providing for the application of a greater turning moment upon thenut or other object with the application of equal or similar forces upon the handle. Another feature of particular importance lies-in the fact'that the movable jaw may be forcibly moved toward the stationary jaw, regardless of the position of the locking lever 17, provided however, that the latter is free to move away from the shank. The contrary is true when a force is'appliedi to. the movable andstationary jaws tending to separate the same as this will result in the locking link being drawn into more rigid and forced engagement with the shank. Mention is made of the fact that in the use of the pipe engagingimember, the locking link will first engage the teeth of the shank locking the stationary and movable jaws against extension and the further closing or looking movement of the locking link will result in the end 22 being thrust forward. The jaw 23 Wlll tllllS obtain a final clamping and wedged engagement upon a curved object which may be interposed therebetween. Also in this case, as before, as the wrench is rotated so as to turn the cylindrical object, the forces brought to bear upon the movable member will tend to lock the same in more rigid engagement therewith and at the same time shank 6.

will tend-to draw the locking link into more rigid and forced engagement with the Having thus fully described my invention, what I claim is 1. A wrench comprising a movable jaw including a shank, a handle slidably receiving said shank therein, a stationary jaw slidably receiving said shank, a link pivotally secured to said stationary jaw, and a locking lever pivotally mounted upon said handle and pivotally engaging said link adapted to move the same into engagement with,to prevent the motion of, said shank 2. A wrench comprising a stationaryjaw, a movable jaw slidably carried thereby and including a shank, a handle slidably mounted upon said shank, a locking lever pivotally secured to said handle, and a lockinglink pivotally secured to the stationary jaw and to the locking. lever. v

3. A wrench comprising a stationary jaw, a movable jaw slidably carried thereby and including a shank, avhandle slidably mounted upon said shank, a locking lever pivotally secured to said handle, and a locking link pivotally secured to the stationary jaw and to the locking, lever, said shank provided with a serrated edge, said locking link provided with a serrated edge adapted to interlocktherewith. I V

4. A wrench comprising a stationary jaw, a movable jaw slidably carried thereby and including a shank, a handle slidably mounted upon said shank, a locking lever. ivotally secured to saidhandle, and a locking link pivotally secured to the stationaryjaw and to the locking lever, said shank'provided with a serrated edge, said locking link pro vided with a serrated edge adapted to inter lock therewith, the pivotal connection between said locking link and stationaryjaw positioned to one side of the line of contact between the serrated edges and providing for the retraction of the movable jaw,.and a locking action against the advancement of said, movablejaw dependent upon the force tending to produce such-motion. a

5. A wrenchcomprising a stationary jaw provided with an aperture extending therethrough, a movable jaw including a head and a shank slidably carried by said stationary jaw, a handle provided with a slot extending therein slidably receiving the said shank, a locking lever pivotally secured to the front portion ofsaid handle, a link pivotally secured to said stationary jaw and to the locking lever at a point; beyond the pivotal connection between the locking lever and handle, said lockinglink provided with a serrated edge, said shank provided with a serrated edge for the interlocking of said link and shank.

6. A wrench comprising a stationary and shank, a handle slidably receiving the said shank, a locking link pivotally secured to the stationary member and adapted to inter lock with the movable jaw shank, and a movable member pivotally carried by the sta-- tionary member and linkedly secured to the said locking link.

7. A wrench comprising a stationary member, a movable jaw including a head and shank, a handle slidably receiving the said shank, a locking link plvotally secured to the stationary member and adapted to im terlock with the movable jaw shank, and a movable member pivotally carried by the stationary member and linkedly secured to the said locking link, said movable memberprovided with a jaw adapted to coact with the jaw of the movable member for the engagement of curved surfaces.

8. A wrench comprising a stationary jaw,

a movable jaw including a head and shank,

a handle slidably mounted upon'said shank, a locking lever carried by said handle, a. lockinglink pivotally secured to said locking lever and said stationary jaw, said shank and locking link rovided with interlocking surfaces, a mova le member pivotally seanember' provided with a jaw coacting with the head of the movable jaw and advanced toward the sameduring and by the locking movement of said locking link.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

WILLIAM H. MOZINGO.

Witnesses:

RALPH R. OAMJEBEIL, CLAnnnR. CAMPBELL.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

